do not use `a' quoting style in comments

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/miscutils/adjtimex.c b/miscutils/adjtimex.c
index 04ba563..0830734 100644
--- a/miscutils/adjtimex.c
+++ b/miscutils/adjtimex.c
@@ -1,6 +1,6 @@
 /* vi: set sw=4 ts=4: */
 /*
- * adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables.
+ * adjtimex.c - read, and possibly modify, the Linux kernel 'timex' variables.
  *
  * Originally written: October 1997
  * Last hack: March 2001
diff --git a/miscutils/time.c b/miscutils/time.c
index 60fc11f..0ecdac1 100644
--- a/miscutils/time.c
+++ b/miscutils/time.c
@@ -127,13 +127,13 @@
 
 /* summarize: Report on the system use of a command.
 
-   Print the FMT argument except that `%' sequences
-   have special meaning, and `\n' and `\t' are translated into
-   newline and tab, respectively, and `\\' is translated into `\'.
+   Print the FMT argument except that '%' sequences
+   have special meaning, and '\n' and '\t' are translated into
+   newline and tab, respectively, and '\\' is translated into '\'.
 
-   The character following a `%' can be:
+   The character following a '%' can be:
    (* means the tcsh time builtin also recognizes it)
-   % == a literal `%'
+   % == a literal '%'
    C == command name and arguments
 *  D == average unshared data size in K (ru_idrss+ru_isrss)
 *  E == elapsed real (wall clock) time in [hour:]min:sec