maint: src/*.[ch]: convert more `...' to '...'

Run this (twice):
  git grep -E -l '`.+'\' src/*.[ch] \
    |xargs perl -pi -e 's/`(.+?'\'')/'\''$1/'

1 files changed, 1 insertions, 1 deletions

diff --git a/src/who.c b/src/who.c
index ceb0d93fb..195316975 100644
--- a/src/who.c
+++ b/src/who.c
@@ -103,7 +103,7 @@ static bool do_lookup;
 
 /* If true, display only a list of usernames and count of
    the users logged on.
-   Ignored for `who am i'.  */
+   Ignored for 'who am i'.  */
 static bool short_list;
 
 /* If true, display only name, line, and time fields.  */