chroot,comm,join: fix usage options style

* src/chroot.c (usage): Fix indentation of options.
* src/comm.c: Likewise.
* src/join.c: Likewise.

src/chroot.c

@@ -195,13 +195,13 @@ Run COMMAND with root directory set to NEWROOT.\n\
 "), stdout);
 
       fputs (_("\
-  --groups=G_LIST        specify supplementary groups as g1,g2,..,gN\n\
+      --groups=G_LIST        specify supplementary groups as g1,g2,..,gN\n\
 "), stdout);
       fputs (_("\
-  --userspec=USER:GROUP  specify user and group (ID or name) to use\n\
+      --userspec=USER:GROUP  specify user and group (ID or name) to use\n\
 "), stdout);
       printf (_("\
-  --skip-chdir           do not change working directory to %s\n\
+      --skip-chdir           do not change working directory to %s\n\
 "), quoteaf ("/"));
 
       fputs (HELP_OPTION_DESCRIPTION, stdout);

src/comm.c

@@ -128,24 +128,24 @@ and column three contains lines common to both files.\n\
 "), stdout);
       fputs (_("\
 \n\
-  -1              suppress column 1 (lines unique to FILE1)\n\
-  -2              suppress column 2 (lines unique to FILE2)\n\
-  -3              suppress column 3 (lines that appear in both files)\n\
+  -1                      suppress column 1 (lines unique to FILE1)\n\
+  -2                      suppress column 2 (lines unique to FILE2)\n\
+  -3                      suppress column 3 (lines that appear in both files)\n\
 "), stdout);
       fputs (_("\
 \n\
-  --check-order     check that the input is correctly sorted, even\n\
-                      if all input lines are pairable\n\
-  --nocheck-order   do not check that the input is correctly sorted\n\
+      --check-order       check that the input is correctly sorted, even\n\
+                            if all input lines are pairable\n\
+      --nocheck-order     do not check that the input is correctly sorted\n\
 "), stdout);
       fputs (_("\
-  --output-delimiter=STR  separate columns with STR\n\
+      --output-delimiter=STR  separate columns with STR\n\
 "), stdout);
       fputs (_("\
-  --total           output a summary\n\
+      --total             output a summary\n\
 "), stdout);
       fputs (_("\
-  -z, --zero-terminated    line delimiter is NUL, not newline\n\
+  -z, --zero-terminated   line delimiter is NUL, not newline\n\
 "), stdout);
       fputs (HELP_OPTION_DESCRIPTION, stdout);
       fputs (VERSION_OPTION_DESCRIPTION, stdout);

src/join.c

@@ -204,28 +204,28 @@ When FILE1 or FILE2 (not both) is -, read standard input.\n\
 "), stdout);
       fputs (_("\
 \n\
-  -a FILENUM        also print unpairable lines from file FILENUM, where\n\
-                      FILENUM is 1 or 2, corresponding to FILE1 or FILE2\n\
-  -e EMPTY          replace missing input fields with EMPTY\n\
+  -a FILENUM             also print unpairable lines from file FILENUM, where\n\
+                           FILENUM is 1 or 2, corresponding to FILE1 or FILE2\n\
+  -e EMPTY               replace missing input fields with EMPTY\n\
 "), stdout);
       fputs (_("\
-  -i, --ignore-case  ignore differences in case when comparing fields\n\
-  -j FIELD          equivalent to '-1 FIELD -2 FIELD'\n\
-  -o FORMAT         obey FORMAT while constructing output line\n\
-  -t CHAR           use CHAR as input and output field separator\n\
+  -i, --ignore-case      ignore differences in case when comparing fields\n\
+  -j FIELD               equivalent to '-1 FIELD -2 FIELD'\n\
+  -o FORMAT              obey FORMAT while constructing output line\n\
+  -t CHAR                use CHAR as input and output field separator\n\
 "), stdout);
       fputs (_("\
-  -v FILENUM        like -a FILENUM, but suppress joined output lines\n\
-  -1 FIELD          join on this FIELD of file 1\n\
-  -2 FIELD          join on this FIELD of file 2\n\
-  --check-order     check that the input is correctly sorted, even\n\
-                      if all input lines are pairable\n\
-  --nocheck-order   do not check that the input is correctly sorted\n\
-  --header          treat the first line in each file as field headers,\n\
-                      print them without trying to pair them\n\
+  -v FILENUM             like -a FILENUM, but suppress joined output lines\n\
+  -1 FIELD               join on this FIELD of file 1\n\
+  -2 FIELD               join on this FIELD of file 2\n\
+      --check-order      check that the input is correctly sorted, even\n\
+                           if all input lines are pairable\n\
+      --nocheck-order    do not check that the input is correctly sorted\n\
+      --header           treat the first line in each file as field headers,\n\
+                           print them without trying to pair them\n\
 "), stdout);
       fputs (_("\
-  -z, --zero-terminated     line delimiter is NUL, not newline\n\
+  -z, --zero-terminated  line delimiter is NUL, not newline\n\
 "), stdout);
       fputs (HELP_OPTION_DESCRIPTION, stdout);
       fputs (VERSION_OPTION_DESCRIPTION, stdout);