rem: do not emit zero-length duration

1 files changed, 8 insertions, 1 deletions

diff --git a/rem.lua b/rem.lua
index c8826dc..1c0887a 100644
--- a/rem.lua
+++ b/rem.lua
@@ -216,7 +216,11 @@ local rem_of_vcalendars do
     --[[-- remind(1): Note that duration is specified in hours and minutes. --]]--
 
     local s
-    local ret = ""
+    local ret
+
+    if dt == 0 then return nil end
+
+    ret = ""
 
     s = dt % 60
     ret = ret .. stringformat ("%0.2d", s)
@@ -230,6 +234,9 @@ local rem_of_vcalendars do
   local rem_date_duration = function (t0, te, loctime)
     local dt = te - t0
     local s_t0 = rem_date (t0, loctime)
+
+    if dt == 0 then return s_t0 end
+
     local s_dt = rem_duration (dt)
 
     return stringformat ("%s DURATION %s", s_t0, s_dt)