Summary:
Fixes a bug where we were skewing some stack traces by sending 1-based column numbers to the Metro symbolication endpoint, which expects them to be 0-based. This is achieved by subtracting 1 from the column numbers we find in textual stack traces, which are almost universally 1-based in current JS engines.
The bug is only noticeable in *some* cases, namely where the column immediately following the correct one is in a different function.
NOTE: The behaviour under Hermes was fixed separately, in a previous commit. This fix applies to other engines (e.g. JSC).
Changelog: [General] [Fixed] - Fix stack traces showing the wrong function name in some cases
Reviewed By: cpojer
Differential Revision: D18628230
fbshipit-source-id: 5677803500e45a41c1005496d19c150526af2d07