grammar scope: Table syntax

[wion]

A scope is needed for greying out all table syntax, leaving only the cell headers and data foreground color.

Note this is different from how iA Writer treats tables; it leaves the syntax as foreground color. Thus, this enhancement would be an improvement over the iA Writer aesthetic.

Requires a concentrated look at regular expressions for this.

[wion]

After much trial and error, the grammar for tables mostly works. This was my test markup, which is not representative of every possible Textile table syntax, but most of it:

table(class#id).
|=. Table 1. Table caption here.
|:. |\2. 26|\3. 16|
|^(thead#id).
|_\2. Header1 Cell Spans Two Columns[^*^] |_. Header3[^†^] |_. Header4 |_. Header5 |
|~(tfoot#id).
|\5. Footer row, cell one, spans all five columns.[^‡^] |
|-(tbody#id).
| data[^§^] | data |/2. @/2@ cell spans two rows | data | data |
(class). | data | data[^¶^] | data | data |
| data | data | data[^‖^] | data | data |
| data[^**^] | data | data[^††^] | data | data |

I did my testing at Regexr.

And here's the current effect...

Note the one dot after the row selector at start of third-to-last row is not greyed out. I could not figure out how to get that one dot without screwing up much more of the other bits, so that one foreground dot is okay with me. I never use a row selector like that anyway.

[wion]

Note the one dot after the row selector at start of third-to-last row is not greyed out.

Fixed with c97a592