Try to make warning message clearer

sloretz · sloretz · commit 470f31f2a9c6 · 2021-11-29T10:07:57.000-08:00
Signed-off-by: Shane Loretz &lt;sloretz@osrfoundation.org&gt;
diff --git a/rclcpp/include/rclcpp/clock.hpp b/rclcpp/include/rclcpp/clock.hpp
@@ -88,7 +88,7 @@ class Clock
    *     false. There is not a consistent choice of sleeping time when the time source changes,
    *     so this is up to the caller to call again if needed.
    *
-   * \warning When using gcc < 10 or gcc >= 10 and pthreads lacks the function
+   * \warning When using gcc < 10 or when using gcc >= 10 and pthreads lacks the function
    *    `pthread_cond_clockwait`, steady clocks may sleep using the system clock.
    *    If so, steady clock sleep times can be affected by system clock time jumps.
    *    Depending on the steady clock's epoch and resolution in comparison to the system clock's,

Original file line number	Diff line number	Diff line change
`@@ -88,7 +88,7 @@ class Clock`
`88`	`88`	`* false. There is not a consistent choice of sleeping time when the time source changes,`
`89`	`89`	`* so this is up to the caller to call again if needed.`
`90`	`90`	`*`
`91`		`- * \warning When using gcc < 10 or gcc >= 10 and pthreads lacks the function`
	`91`	`+ * \warning When using gcc < 10 or when using gcc >= 10 and pthreads lacks the function`
`92`	`92`	* `pthread_cond_clockwait`, steady clocks may sleep using the system clock.
`93`	`93`	`* If so, steady clock sleep times can be affected by system clock time jumps.`
`94`	`94`	`* Depending on the steady clock's epoch and resolution in comparison to the system clock's,`