doc: Fix typos

Signed-off-by: Lucas Schwiderski <lucas@lschwiderski.de>

lib/gears/table.lua

@@ -414,7 +414,7 @@ end
 
 --- Map a function to a table.
 --
--- The function is applied to each value on the table, returning a modified
+-- The function is applied to each value in the table, returning a modified
 -- table.
 --
 -- @tparam function f The function to be applied to each value in the table.

lib/gears/timer.lua

@@ -249,7 +249,7 @@ function timer.run_delayed_calls_now()
     delayed_calls = {}
 end
 
---- Call the given function at the end of the current main loop iteration
+--- Call the given function at the end of the current main loop iteration.
 -- @tparam function callback The function that should be called
 -- @param ... Arguments to the callback function
 -- @staticfct gears.timer.delayed_call