Minor fixes to g_angle help description.

A few grammatical tweaks and removal of an ambiguous sentence to make
the help description somewhat clearer and more generally applicable.

Change-Id: Ibd2e8a9f43fd81cc1905f06f075f2e43b68bebab

diff --git a/src/tools/gmx_angle.c b/src/tools/gmx_angle.c
index 3f290d6dceae9129b6a5c383d8cdba0c0da80ead..51ba5123b50aa561d843d9901b47730aa5fefcc2 100644 (file)
--- a/src/tools/gmx_angle.c
+++ b/src/tools/gmx_angle.c
@@ -97,20 +97,20 @@ int gmx_g_angle(int argc,char *argv[])
 {
   static const char *desc[] = {
     "[TT]g_angle[tt] computes the angle distribution for a number of angles",
-    "or dihedrals. This way you can check whether your simulation",
-    "is correct. With option [TT]-ov[tt] you can plot the average angle of",
-    "a group of angles as a function of time. With the [TT]-all[tt] option",
-    "the first graph is the average, the rest are the individual angles.[PAR]",
+    "or dihedrals.[PAR]",
+    "With option [TT]-ov[tt], you can plot the average angle of",
+    "a group of angles as a function of time. With the [TT]-all[tt] option,",
+    "the first graph is the average and the rest are the individual angles.[PAR]",
     "With the [TT]-of[tt] option, [TT]g_angle[tt] also calculates the fraction of trans",
     "dihedrals (only for dihedrals) as function of time, but this is",
-    "probably only fun for a selected few.[PAR]",
-    "With option [TT]-oc[tt] a dihedral correlation function is calculated.[PAR]",
-    "It should be noted that the index file should contain",
-    "atom-triples for angles or atom-quadruplets for dihedrals.",
+    "probably only fun for a select few.[PAR]",
+    "With option [TT]-oc[tt], a dihedral correlation function is calculated.[PAR]",
+    "It should be noted that the index file must contain",
+    "atom triplets for angles or atom quadruplets for dihedrals.",
     "If this is not the case, the program will crash.[PAR]",
-    "With option [TT]-or[tt] a trajectory file is dumped containing cos and",
-    "sin of selected dihedral angles which subsequently can be used as",
-    "input for a PCA analysis using [TT]g_covar[tt].[PAR]",
+    "With option [TT]-or[tt], a trajectory file is dumped containing cos and",
+    "sin of selected dihedral angles, which subsequently can be used as",
+    "input for a principal components analysis using [TT]g_covar[tt].[PAR]",
     "Option [TT]-ot[tt] plots when transitions occur between",
     "dihedral rotamers of multiplicity 3 and [TT]-oh[tt]",
     "records a histogram of the times between such transitions,",