Adjust case of reldate letters according to ISO-8601

This commit fixes the wrong use of 'm' for month and 'M' for minute:
In ISO-8601, uppercase letters YYYY-MM-DD are used to denote year,month,week,day;
whereas lowercase letters hh:mm:ss are used for hour,minute,second.

Closes #759

3 files changed, 30 insertions, 29 deletions

diff --git a/NEWS.adoc b/NEWS.adoc
index deb0681f..bf89eec5 100644
--- a/NEWS.adoc
+++ b/NEWS.adoc
@@ -12,6 +12,7 @@ Improvements:
  - Change the blame view to render more like `git blame`. (GH #812)
  - Improve worktree and submodule support. (GH #459, #781, #783)
  - Support running Tig via a Git alias. (GH #763)
+ - Use ISO-8601 letters for short relative dates. (GH #759)
 
 Bug fixes:
 
diff --git a/src/util.c b/src/util.c
index 0684a2a9..47e8207d 100644
--- a/src/util.c
+++ b/src/util.c
@@ -133,12 +133,12 @@ struct reldate {
 
 static const struct reldate reldate[] = {
 	{ "second", 's', 1,			 60 * 2 },
-	{ "minute", 'M', 60,			 60 * 60 * 2 },
+	{ "minute", 'm', 60,			 60 * 60 * 2 },
 	{ "hour",   'h', 60 * 60,		 60 * 60 * 24 * 2 },
-	{ "day",    'd', 60 * 60 * 24,		 60 * 60 * 24 * 7 * 2 },
-	{ "week",   'w', 60 * 60 * 24 * 7,	 60 * 60 * 24 * 7 * 5 },
-	{ "month",  'm', 60 * 60 * 24 * 30,	 60 * 60 * 24 * 365 },
-	{ "year",   'y', 60 * 60 * 24 * 365,  0 },
+	{ "day",    'D', 60 * 60 * 24,		 60 * 60 * 24 * 7 * 2 },
+	{ "week",   'W', 60 * 60 * 24 * 7,	 60 * 60 * 24 * 7 * 5 },
+	{ "month",  'M', 60 * 60 * 24 * 30,	 60 * 60 * 24 * 365 },
+	{ "year",   'Y', 60 * 60 * 24 * 365,  0 },
 };
 
 static const char *
diff --git a/test/main/date-test b/test/main/date-test
index d7cdfde5..694e5f64 100755
--- a/test/main/date-test
+++ b/test/main/date-test
@@ -126,30 +126,30 @@ EOF
 
 assert_equals 'relative-compact-date.screen' <<EOF
 25h Kentaro Wada        Add zsh completion file for autoload
-7d  Jonas Fonseca       Refactor DEFINE_ALLOCATOR to use helper method and asser
-1m  Sven Wegener        display: factor out separator functions
-8d  Jonas Fonseca       Merge pull request #429 from ideal/master
-13d ideal               check if mem is NULL in DEFINE_ALLOCATOR
-2m  Jonas Fonseca       Use git_init to initialize the test/stage/gh-410-test re
-4m  Jonas Fonseca       Keep unstaged changes view open after an staging command
-5m  Jonas Fonseca       When redrawing the readline prompt also update the curso
-6m  Jonas Fonseca       Move script helper before usages in the display module
-7m  Jonas Fonseca       Merge branch 'hashed-refs'
-9m  Jonas Fonseca       hashed-refs: Use a hash table as the main data structure
-9m  Jonas Fonseca       Unify option_info lookup for normal options and view col
-10m Jonas Fonseca       Add option to turn off automatic enabling of topo-order
-11m Tom Greuter         Add option to install Tig with Homebrew
-12m Jonas Fonseca       Fix diff context restoring for diff opened directly via
-1y  Michael Barlow      Add mouse support
-2y  Jonas Fonseca       Refactor stage view title formatting
-3y  Jonas Fonseca       [GH #83] WIP: main view lazy navigation mode prototype
-3y  P. Sadik            Create and use dup() of STDIN_FILENO instead of STDIN_FI
-4y  Jonathan Neuschäfer Don't show out-of-sight tildes
-5y  Pierre Habouzit     Add an option to ignore unknown directories contents in
-6y  Jonas Fonseca       Fix another regression from the dirty flag changes causi
-7y  Jonas Fonseca       tig-0.10.git
-8y  Jonas Fonseca       Only split the tree view when the tree view is visible
-9y  Jonas Fonseca       Initial commit
+7D  Jonas Fonseca       Refactor DEFINE_ALLOCATOR to use helper method and asser
+1M  Sven Wegener        display: factor out separator functions
+8D  Jonas Fonseca       Merge pull request #429 from ideal/master
+13D ideal               check if mem is NULL in DEFINE_ALLOCATOR
+2M  Jonas Fonseca       Use git_init to initialize the test/stage/gh-410-test re
+4M  Jonas Fonseca       Keep unstaged changes view open after an staging command
+5M  Jonas Fonseca       When redrawing the readline prompt also update the curso
+6M  Jonas Fonseca       Move script helper before usages in the display module
+7M  Jonas Fonseca       Merge branch 'hashed-refs'
+9M  Jonas Fonseca       hashed-refs: Use a hash table as the main data structure
+9M  Jonas Fonseca       Unify option_info lookup for normal options and view col
+10M Jonas Fonseca       Add option to turn off automatic enabling of topo-order
+11M Tom Greuter         Add option to install Tig with Homebrew
+12M Jonas Fonseca       Fix diff context restoring for diff opened directly via
+1Y  Michael Barlow      Add mouse support
+2Y  Jonas Fonseca       Refactor stage view title formatting
+3Y  Jonas Fonseca       [GH #83] WIP: main view lazy navigation mode prototype
+3Y  P. Sadik            Create and use dup() of STDIN_FILENO instead of STDIN_FI
+4Y  Jonathan Neuschäfer Don't show out-of-sight tildes
+5Y  Pierre Habouzit     Add an option to ignore unknown directories contents in
+6Y  Jonas Fonseca       Fix another regression from the dirty flag changes causi
+7Y  Jonas Fonseca       tig-0.10.git
+8Y  Jonas Fonseca       Only split the tree view when the tree view is visible
+9Y  Jonas Fonseca       Initial commit
 [main] 91912eb97da4f6907015dab41ef9bba315730854 - commit 1 of 25            100%
 EOF