Issue 624 newer older help text (#733)

* Document the newer and older aliases in the help text

* Documentation for new older aliases, remove commas

* Adds better clarification on alias usage for newer and older

* Fixes inconsistencies in help text for newer and older aliases

Author: mitch292

src/app.rs

@@ -442,10 +442,12 @@ pub fn build_app() -> App<'static, 'static> {
                 .long_help(
                     "Filter results based on the file modification time. The argument can be provided \
                      as a specific point in time (YYYY-MM-DD HH:MM:SS) or as a duration (10h, 1d, 35min). \
-                     '--change-newer-than' can be used as an alias.\n\
+                     If the time is not specified, it defaults to 00:00:00. \
+                     '--change-newer-than' or '--newer' can be used as aliases.\n\
                      Examples:\n    \
                          --changed-within 2weeks\n    \
-                         --change-newer-than '2018-10-27 10:00:00'",
+                         --change-newer-than '2018-10-27 10:00:00'\n    \
+                         --newer 2018-10-27",
                 ),
         )
         .arg(
@@ -460,10 +462,11 @@ pub fn build_app() -> App<'static, 'static> {
                 .long_help(
                     "Filter results based on the file modification time. The argument can be provided \
                      as a specific point in time (YYYY-MM-DD HH:MM:SS) or as a duration (10h, 1d, 35min). \
-                     '--change-older-than' can be used as an alias.\n\
+                     '--change-older-than' or '--older' can be used as aliases.\n\
                      Examples:\n    \
                          --changed-before '2018-10-27 10:00:00'\n    \
-                         --change-older-than 2weeks",
+                         --change-older-than 2weeks\n    \
+                         --older 2018-10-27",
                 ),
         )
         .arg(