Improper use of "characterFormat" codes around a table causes run-away processing

[EricShulman]

Found by Harley Pebley and reported on TiddlyWikiDev? GoogleGroup?:

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If you put bold marks around a table, browser locks up and then reports a message indicating a script isn't responding.

Pretty easy to do: 1. Create a new tiddler. 2. Paste this into it:

''|C1R1|C2R1|
|C1R2|C2R2|
|C1R3|C2R3|
|C1R4|C2R4|''

3. Click done. ==> Error.

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Note that the above syntax is "improper", but easy to use by mistake.

Also applies to use of //, , , , or --, but NOT

Note: cancelling processing (after FireFox? message) shows that first row of table is rendered as regular text (not a table) with characterFormat applied, intermediate rows are being rendered as a table, final row is not rendered at all.

[EricShulman]

Replying to EricShulman: re-entered example so it is readable as a code block

''|C1R1|C2R1|
|C1R2|C2R2|
|C1R3|C2R3|
|C1R4|C2R4|''

Also applies to use of other characterFormat syntax:

'', //, __, ^^, ~~, or --

[MartinBudden]

Fixed in changeset:5154

[FND]

previous fix reverted in changeset:5159