1 files changed, 6 insertions, 2 deletions

diff --git a/tr.c b/tr.c
index ff0f331ff..07922af17 100644
--- a/tr.c
+++ b/tr.c
@@ -33,7 +33,7 @@
 
 static const int ASCII = 0377;
 
-/* some glabals shared across this file */
+/* some "globals" shared across this file */
 static char com_fl, del_fl, sq_fl;
 static short in_index, out_index;
 /* these last are pointers to static buffers declared in tr_main */
@@ -90,6 +90,10 @@ static void map(register unsigned char *string1, unsigned int string1_len,
         }
 }
 
+/* supported constructs:
+ *   Ranges,  e.g.,  [0-9]  ==>  0123456789
+ *   Escapes, e.g.,  \a     ==>  Control-G
+ */
 static unsigned int expand(const char *arg, register unsigned char *buffer)
 {
         unsigned char *buffer_start = buffer;
@@ -110,7 +114,7 @@ static unsigned int expand(const char *arg, register unsigned char *buffer)
                         ac = *arg++;
                         while (i <= ac)
                                 *buffer++ = i++;
-                        arg++;                          /* Skip ']' */
+                        arg++;                          /* Skip the assumed ']' */
                 } else
                         *buffer++ = *arg++;
         }