implement some uniformity among package headers

- The headline is used as clarification in lists of packages, so is not
  intended as a title, hence in headlines:
  - no capitalization
  - no period at the end
  - the form "a package for ..." is redundant
  - the forms "computations for ..." or "working with ..." are redundant
- no use of "DebuggingMode => true"
- no use of "Reload => true"

M2/Macaulay2/packages/AdjointIdeal.m2

@@ -6,7 +6,7 @@ newPackage(
     	Authors => {{Name => "Janko Boehm", 
 		  Email => "boehm@mathematik.uni-kl.de", 
 		  HomePage => "http://www.math.uni-sb.de/ag/schreyer/jb/"}},
-    	Headline => "Adjoint ideals of plane curves and related computations",
+    	Headline => "adjoint ideals of plane curves and related computations",
     	DebuggingMode => false,
 	CacheExampleOutput => true,
 	PackageImports => {"IntegralClosure","MapleInterface"},

M2/Macaulay2/packages/AlgebraicSplines.m2

@@ -19,7 +19,7 @@ newPackage select((
 	    {Name => "Eliana Duarte", Email => "emduart2@illinois.edu", HomePage => "https://faculty.math.illinois.edu/~emduart2/"},
 	    {Name => "Daniel Irving Bernstein", Email=> "dibernst@ncsu.edu", HomePage =>"http://www4.ncsu.edu/~dibernst"}
         },
-        Headline => "Package for splines on simplicial complexes, polytopal complexes, and graphs",
+        Headline => "splines on simplicial complexes, polytopal complexes, and graphs",
         Configuration => {},
         DebuggingMode => false,
 	PackageImports => { "Elimination" },

M2/Macaulay2/packages/AnalyzeSheafOnP1.m2

@@ -5,7 +5,7 @@
              Authors => {{Name => "David Eisenbud", 
                        Email => "de@msri.org", 
                        HomePage => "http://www.msri.org/~de"}},
-             Headline => "Decompose a Sheaf on P1",
+             Headline => "decompose a Sheaf on P1",
              DebuggingMode => false
              )
      export {

M2/Macaulay2/packages/BIBasis.m2

@@ -12,7 +12,7 @@ newPackage(
     Authors => {
         {Name => "Mikhail Zinin", Email => "mzinin@gmail.com"}
     },
-    Headline => "Involutive Pommaret basis in a Boolean ring",
+    Headline => "involutive Pommaret basis in a Boolean ring",
     PackageImports => {"BooleanGB"},
     DebuggingMode => false
     )

M2/Macaulay2/packages/Bertini.m2

@@ -16,10 +16,8 @@ newPackage(
      Email => "leykin@math.gatech.edu",
      HomePage => "http://www.math.gatech.edu/~leykin"}
   },
-  Headline => "Interface to Bertini",
+  Headline => "interface to Bertini",
   Configuration => { "BERTINIexecutable"=>"bertini" },
- -- DebuggingMode => true,
-  DebuggingMode => true,
   AuxiliaryFiles => true,
   PackageExports => {"NAGtypes"},
   PackageImports => {"NAGtypes"},

M2/Macaulay2/packages/BinomialEdgeIdeals.m2

@@ -5,7 +5,7 @@ newPackage("BinomialEdgeIdeals",
      {Name => "Tobias Windisch",
       Email => "windisch@ovgu.de",
       HomePage => "http://www.uni-magdeburg.de/windisch/"}},
-   Headline => "Package for computations with  binomial edge ideals",
+   Headline => "binomial edge ideals",
    PackageImports => {"Graphs","Binomials"}
 	)
 
@@ -156,11 +156,9 @@ beginDocumentation()
 
 document {
         Key => BinomialEdgeIdeals,
-        Headline => "a package for binomial edge ideals",
-
+        Headline => "binomial edge ideals",
         EM "BinomialEdgeIdeals", " is a package for computations with binomial edge
         ideals",
-
 	BR{},BR{},
 	BOLD "Literature \n",
 	UL {
@@ -176,7 +174,7 @@ document {
 document {
      Key => {parityBinomialEdgeIdeal,
 	  (parityBinomialEdgeIdeal, Graph), (parityBinomialEdgeIdeal, List)},
-     Headline => "Parity binomial edge ideals",
+     Headline => "parity binomial edge ideals",
      Usage => "parityBinomialEdgeIdeal G",
      Inputs => {
           "G" => { "a Graph or a List"} },

M2/Macaulay2/packages/Binomials.m2

@@ -29,7 +29,7 @@ newPackage(
 		  Name => "Thomas Kahle",
 		  Email => "thomas.kahle@jpberlin.de",
 		  HomePage => "http://www.thomas-kahle.de"}},
-    	Headline => "Specialized routines for binomial ideals",
+    	Headline => "specialized routines for binomial ideals",
 	PackageImports => {"FourTiTwo", "Cyclotomic", "LLLBases", "Elimination"},
 	Certification => {
 	     "journal name" => "The Journal of Software for Algebra and Geometry: Macaulay2",

M2/Macaulay2/packages/Book3264Examples.m2

@@ -11,7 +11,7 @@ newPackage(
 	       Email => "charleyc@math.berkeley.edu",
 	       HomePage => "http://math.berkeley.edu/~charleyc/"}},
      PackageExports => {"Schubert2", "SchurRings"},
-     Headline => "Examples to accompany the eponymous book by Eisenbud and Harris"
+     Headline => "examples to accompany the eponymous book by Eisenbud and Harris"
      )
 
 export {"grassmannian", "placeholderSchubertCycle", "diagrams", "placeholderToSchubertBasis"}

M2/Macaulay2/packages/BooleanGB.m2

@@ -7,7 +7,7 @@ newPackage(
     HomePage => "http://www.math.vt.edu/people/fhinkel/"}, 
     {Name => "Mike Stillman"},
     {Name => "Elizabeth Arnold"}},
-    Headline => "Groebner Bases for Ideals in Boolean Polynomial Quotient Ring",
+    Headline => "Groebner bases for ideals in Boolean polynomial quotient rings",
     DebuggingMode => false
     )
 

M2/Macaulay2/packages/ChainComplexExtras.m2

@@ -9,7 +9,7 @@ newPackage(
 	  {Name => "Greg Smith", Email => "ggsmith@mast.queensu.ca", HomePage => "http://www.mast.queensu.ca/~ggsmith"},
 	  {Name => "Lily Silverstein", Email => "lsilverstein@cpp.edu", HomePage => "https://www.cpp.edu/faculty/lsilverstein/"}
 	  },
-     Headline => "Some additional ChainComplex Functions.",
+     Headline => "some additional ChainComplex Functions",
      DebuggingMode =>false
      )
 

M2/Macaulay2/packages/CharacteristicClasses.m2

@@ -9,7 +9,7 @@ newPackage(
 		  HomePage => "https://math.berkeley.edu/~mhelmer/"},
 	      {Name => "Christine Jost", 
 		  Email => "christine.e.jost@gmail.com"}},
-    	Headline => "Computes CSM classes, Segre classes and the Euler Char. for some Subschemes of Smooth Complete Toric Varieties",
+    	Headline => "CSM classes, Segre classes and the Euler characteristic for some subschemes of smooth complete toric varieties",
     	DebuggingMode => false,
 	PackageImports => { "Elimination", "PrimaryDecomposition", "NormalToricVarieties"},
 	Configuration => { "pathToBertini" => ""},

M2/Macaulay2/packages/Chordal.m2

@@ -11,7 +11,7 @@ newPackage(
        Email => "parrilo@mit.edu",
        HomePage => "http://www.mit.edu/~parrilo/"}
     },
-    Headline => "A package that exploits chordal structure",
+    Headline => "routines that exploit chordal structure",
     AuxiliaryFiles => true,
     PackageExports => {"Graphs","TriangularSets"}
 )

M2/Macaulay2/packages/CoincidentRootLoci.m2

@@ -5,7 +5,7 @@ newPackage(
        "CoincidentRootLoci",
 	Version => "0.1.1", 
         Date => "June 1, 2018",
-    	Headline => "A package for computations with coincident root loci",
+    	Headline => "coincident root loci",
         Authors => {{Name => "M. C. Brambilla", Email => "brambilla@dipmat.univpm.it"},
                     {Name => "G. Staglianò", Email => "giovannistagliano@gmail.com"}},
         PackageExports => {"Cremona","Resultants"},

M2/Macaulay2/packages/CompleteIntersectionResolutions.m2

@@ -5,7 +5,7 @@ newPackage(
               Authors => {{Name => "David Eisenbud", 
                         Email => "de@msri.org", 
                         HomePage => "http://www.msri.org/~de"}},
-              Headline => "Analyzing Resolutions over a Complete Intersection",
+              Headline => "analyzing resolutions over a complete intersection",
 	      PackageImports => {"Truncations"},
 	      PackageExports => {"MCMApproximations","BGG"},
 --note: this package requires  MCMApproximations.m2

M2/Macaulay2/packages/Complexes.m2

@@ -139,9 +139,8 @@ newPackage(
 	     {Name => "Gregory G. Smith", Email => "ggsmith@mast.queensu.ca", HomePage => "http://www.mast.queensu.ca/~ggsmith"},
 	     {Name => "Mike Stillman", Email => "mike@math.cornell.edu", HomePage => "http://www.math.cornell.edu/~mike"}
 	     },
-        Headline => "Chain complexes",
-        AuxiliaryFiles => false,
-        DebuggingMode => true
+        Headline => "chain complexes",
+        AuxiliaryFiles => false
         )
 
 export {

M2/Macaulay2/packages/ConvexInterface.m2

@@ -6,7 +6,7 @@ newPackage(
 		  Email =>"boehm@mathematik.uni-kl.de", 
 		  HomePage =>"http://www.math.uni-sb.de/ag/schreyer/jb/"}
                   },
-    	Headline =>"Interface to Convex",
+    	Headline =>"interface to Convex",
     	DebuggingMode => false,
         Configuration =>{"ConvexPath"=>""},
 	CacheExampleOutput => true,

M2/Macaulay2/packages/CorrespondenceScrolls.m2

@@ -21,7 +21,7 @@ newPackage(
 	          {Name =>"Alessio Sammartano",
 		   -- Email => "",
 		   HomePage => ""}},
-    	Headline => "CorrespondenceScrolls",
+    	Headline => "correspondence scrolls",
 	PackageImports => { "Elimination" }
 	)
 

M2/Macaulay2/packages/Cremona.m2

@@ -4,7 +4,7 @@ newPackage(
 	Version => "4.3", 
         Date => "March 27, 2019",
     	Authors => {{Name => "Giovanni Staglianò", Email => "giovannistagliano@gmail.com" }},
-    	Headline => "Some computations for rational maps between projective varieties",
+    	Headline => "rational maps between projective varieties",
         AuxiliaryFiles => true,
 	Certification => {
 	     "journal name" => "The Journal of Software for Algebra and Geometry",

M2/Macaulay2/packages/Cyclotomic.m2

@@ -28,7 +28,7 @@ newPackage(
     	Authors => {{Name => "Thomas Kahle", 
 		  Email => "thomas.kahle@jpberlin.de",
 		  HomePage => "http://thomas-kahle.de"}},
-	Headline => "Routines for cyclotomic fields"
+	Headline => "cyclotomic fields"
     	)
 
 export {"cyclotomicField",
@@ -147,15 +147,15 @@ beginDocumentation()
 
 document { 
         Key => Cyclotomic,
-        Headline => "a package for cyclotomic fields",
+        Headline => "cyclotomic fields",
         EM "Cyclotomic", " is a package for cyclotomic fields.  It is used in
         to construct extensions of the coefficient field during binomial
         primary decomposition using the package ", TO "Binomials::Binomials", "."
         }
 
 document {
      Key => {cyclotomicField},
-     Headline => "Cyclotomic Field Construction",
+     Headline => "cyclotomic field construction",
      Usage => "cyclotomicField (i)",
      Inputs => {
           "i" => { "an integer, the power of the root to be adjoined."}},

M2/Macaulay2/packages/DGAlgebras.m2

@@ -1,6 +1,6 @@
 -- -*- coding: utf-8 -*-
 newPackage("DGAlgebras",
-     Headline => "Data type for DG algebras",
+     Headline => "data type for DG algebras",
      Version => "1.0.1",
      Date => "January 11, 2017",
      Authors => {

M2/Macaulay2/packages/DeterminantalRepresentations.m2

@@ -8,7 +8,7 @@ newPackage("DeterminantalRepresentations",
 		{Name => "Papri Dey",
 		Email => "papridey@berkeley.edu"}
 	},
-	Headline => "a package for computing determinantal representations",
+	Headline => "determinantal representations",
 	HomePage => "https://github.com/papridey/DeterminantalRepresentations",
 	PackageExports => {"NumericalAlgebraicGeometry"},
 	DebuggingMode => false,

M2/Macaulay2/packages/DiffAlg.m2

@@ -22,7 +22,7 @@ newPackage (
 		  Email => "fquallb@dm.uba.ar",
 		  HomePage => ""}
 	},
-	Headline => "Specialized routines for differential forms",
+	Headline => "specialized routines for differential forms",
 	Configuration => { 
 		"BaseRing" => F,
 		"VariableName" => "x",
@@ -477,7 +477,7 @@ beginDocumentation()
 
 document {
   Key => DiffAlg,
-  Headline => "a differential algebra package",
+  Headline => "differential algebra",
   PARA {TO DiffAlg, " is a differential algebra package. It can compute the usual operations with polynomial differential forms and vector fields. Its main purpose is to associate algebraic objects to differential operators in the exterior algebra of differential forms."},
   PARA {"The simplest way to load the package is with the command:"},
   TT {"loadPackage \"DiffAlg\""},

M2/Macaulay2/packages/Divisor.m2

@@ -6,7 +6,7 @@ newPackage( "Divisor",
      Authors => {
 	  {Name => "Karl Schwede", Email=> "kschwede@gmail.com", HomePage=> "http://www.math.utah.edu/~schwede"},
      	  {Name=> "Zhaoning Yang", Email=> "zyy5054@gmail.com", HomePage => "http://sites.psu.edu/zhaoningyang"}},
-     Headline => "a package for working with Weil divisors",
+     Headline => "Weil divisors",
      PackageImports => { "IntegralClosure", "RationalMaps" },
      Certification => {
 	  "journal name" => "The Journal of Software for Algebra and Geometry",
@@ -1944,7 +1944,7 @@ beginDocumentation();
 
 document {
     Key => Divisor,
-    Headline => "a package for computations with divisors",
+    Headline => "divisors",
     EM "Divisor", " is a package for working with (Q/R)-Weil divisors on ", EM "normal", " affine and projective varieties (equivalently, on commutative, normal and graded rings).", 
     BR{},BR{},
     "This package introduces a type ", TO "WeilDivisor", " which lets the user work with Weil divisors similar to the way one might in algebraic geometry.  We highlight a few important functions below.",

M2/Macaulay2/packages/Dmodules.m2

@@ -2,7 +2,7 @@
 newPackage("Dmodules", 
      Version => "1.4.0.1",
      Date => "01/28/2011",
-     Headline => "functions for computations with D-modules",
+     Headline => "D-modules",
      HomePage => "http://people.math.gatech.edu/~aleykin3/Dmodules",
      AuxiliaryFiles => true,
      Authors => {

M2/Macaulay2/packages/EdgeIdeals.m2

@@ -44,7 +44,7 @@ newPackage(
 			HomePage => "http://flash.lakeheadu.ca/~avantuyl/"
 		}
 	},
-	Headline => "a package for edge ideals.",
+	Headline => "edge ideals",
 	DebuggingMode => false
 )
 

M2/Macaulay2/packages/Elimination.m2

@@ -3,7 +3,7 @@ newPackage("Elimination",
      Version => "1.0", 
      Date => "January 5, 2005",
      Authors => {{Name => "Michael E. Stillman", Email => "mike@math.cornell.edu"}},
-     Headline => "a package for elimination of variables"
+     Headline => "elimination of variables"
      )
 
 export {"eliminate", "sylvesterMatrix", "discriminant", "resultant"}

M2/Macaulay2/packages/EliminationMatrices.m2

@@ -12,7 +12,7 @@ newPackage("EliminationMatrices",
 	     {Name => "Laurent Busé", Email => "Laurent.Buse@inria.fr", HomePage => "http://www-sop.inria.fr/members/Laurent.Buse/"},
 	     {Name => "Manuel Dubinsky", Email => "manudubinsky@gmail.com" }
 	     },
-   Headline => "Package for computing resultants",
+   Headline => "resultants",
    PackageImports => { "Elimination" },
    DebuggingMode => false
    )
@@ -796,7 +796,7 @@ beginDocumentation()
 ---------------------------------------------------------------
 document {
 	Key => {EliminationMatrices},
-	Headline => "A package for computing resultants.",
+	Headline => "resultants",
 
 	TT "EliminationMatrices", " is a package for elimination theory, emphasizing universal formulas, in particular, resultant computations.",
 

M2/Macaulay2/packages/EllipticCurves.m2

@@ -7,7 +7,7 @@ newPackage(
 		  Email => "oneto@math.su.se"},
 	    {Name => "Stefano Marseglia", 
 		  Email => "stefanom@math.su.se"}},
-    	Headline => "Group law on elliptic curves (and counting points with brute force methods)"
+    	Headline => "group law on elliptic curves (and counting points with brute force methods)"
     	)
 
 export {
@@ -504,7 +504,7 @@ beginDocumentation()
 
 document {
      Key => EllipticCurves,
-     Headline => "A package for basic functions on elliptic curves and a bruteforce method for point counting.",
+     Headline => "elliptic curves and a brute-force method for point counting",
      }
 
 document {

M2/Macaulay2/packages/ExampleIdeals.m2

@@ -7,7 +7,7 @@ newPackage(
     	Authors => {{Name => "Mike Stillman", 
 		  Email => "mike@math.cornell.edu", 
 		  HomePage => "http://www.math.cornell.edu/~mike/"}},
-    	Headline => "a package consisting of examples of ideals",
+    	Headline => "examples of ideals",
      	PackageImports => { "Markov" },
     	DebuggingMode => false
     	)

M2/Macaulay2/packages/ExteriorIdeals.m2

@@ -5,7 +5,7 @@ newPackage(
         Date => "July 13, 2017",
         Authors => {{Name => "Marilena Crupi", Email => "mcrupi@unime.it", HomePage => "http://www.unime.it/it/persona/marilena-crupi"},
                     {Name => "Luca Amata", Email => "lamata@unime.it"}},
-        Headline => "A Macaulay2 package for manipulating monomial ideals over exterior algebra",
+        Headline => "monomial ideals over exterior algebras",
         DebuggingMode => false,
 	Certification => {
 	     "journal name" => "The Journal of Software for Algebra and Geometry",

M2/Macaulay2/packages/FGLM.m2

@@ -6,8 +6,7 @@ newPackage(
         { Name => "Dylan Peifer",   Email => "djp282@cornell.edu", HomePage => "https://math.cornell.edu/~djp282" },
         { Name => "Mahrud Sayrafi", Email => "mahrud@umn.edu",     HomePage => "https://math.umn.edu/~mahrud" }
         },
-    Headline => "Compute Groebner bases via the FGLM algorithm",
-    DebuggingMode => true
+    Headline => "Groebner bases via the FGLM algorithm"
     )
 
 -*

M2/Macaulay2/packages/FastLinAlg.m2

@@ -15,7 +15,7 @@ Version => "0.1", Date => "October 21st, 2019", Authors => {
     Email=> "yuhuiyao4ever@gmail.com"
     }
 }, --this file is in the public domain
-Headline => "A package for faster linear algebra operations.", DebuggingMode => true, Reload=>true)
+Headline => "faster linear algebra operations")
 export{
 --  "selectSmallestTerms",
   "chooseSubmatrixSmallestDegree", --there are checks

M2/Macaulay2/packages/FiniteFittingIdeals.m2

@@ -7,7 +7,7 @@
 -- UPDATE HISTORY : March 2015 v0.1, May 2015 v1.0
 ---------------------------------------------------------------------------
 newPackage("FiniteFittingIdeals",
-    Headline => "A package for computing Fitting ideals of finite modules",
+    Headline => "Fitting ideals of finite modules",
     Version => "1.0",
     Date => "May 5, 2015",
     Authors => {

M2/Macaulay2/packages/FormalGroupLaws.m2

@@ -9,7 +9,7 @@ newPackage(
 		HomePage => "http://www.math.uni-bielefeld.de/~bcalmes/"},
                 {Name => "Viktor Petrov"}
 		},
-	Headline => "Package to deal with commutative formal group laws",
+	Headline => "commutative formal group laws",
 	PackageImports => {"Truncations"},
 	DebuggingMode => false)