Correct behavior for `registry incr`
c91a0a8b9faa
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Description

Correct behavior for registry incr

Summary:
The proc didn't support registry incr <variable> <term>,
only registry incr <variable>.

Fixes T793.

Test Plan:
Actual incrementation

Increment a non existing variable
Increment the same variable with the default term 1
Increment the same variable with an arbitrary term
Ensure the final value is correct

Error handling

Increment with a non integer term

Tested on Wearg

16:22:08 <Dereckson> .s Core
16:22:09 <Dereckson> .tcl registry incr quux
16:22:09 <Wearg> Tcl:
16:22:12 <Dereckson> .tcl registry incr quux
16:22:12 <Wearg> Tcl:
16:22:13 <Dereckson> .tcl registry incr quux
16:22:13 <Wearg> Tcl:
16:22:14 <Dereckson> .tcl registry incr quux
16:22:14 <Wearg> Tcl:
16:22:16 <Dereckson> .tcl registry incr quux 9
16:22:16 <Wearg> Tcl:
16:22:18 <Dereckson> .tcl registry incr quux foo
16:22:18 <Wearg> Tcl error: The increment term must be integer.
16:22:29 <Dereckson> .tcl registry get quux
16:22:29 <Wearg> Tcl: 13

Reviewers: dereckson

Maniphest Tasks: T793

Differential Revision: http://devcentral.nasqueron.org/D349