Mention breaking change regarding extra quotation marks around text strings in changelog v0.12.0

[yvonnefroehlich]

Mention a breaking change regarding how text wrapped by extra quotation marks is handled in the changelog v0.12.0. The change was introduced in #3132 (went into v0.12.0). However it was not recognized, but now it is reported in #3457 (after v0.13.0 was released). For details, please see #3457 (comment).

So far, it is listed under "Enhancements" as the related PR #3132 is also listed there. The formulation is a first suggestion.

Fixes #3457

Preview: https://pygmt-dev--3462.org.readthedocs.build/en/3462/changes.html#id2

[weiji14]

Do we need to be specific that it is double quotes " " that will show up after v0.12.0?

Suggested change

	* **Breaking**: (Unneeded) extra quotation marks around text strings (containing whitespaces) are now considered as part of the text string ([#3132](https://github.com/GenericMappingTools/pygmt/pull/3132), [#3457](https://github.com/GenericMappingTools/pygmt/issues/3457))
	* **Breaking**: (Unneeded) extra double quotes around text strings (containing whitespaces) are now considered as part of the text string ([#3132](https://github.com/GenericMappingTools/pygmt/pull/3132), [#3457](https://github.com/GenericMappingTools/pygmt/issues/3457))

[yvonnefroehlich]

Hm. In principle both comibinations (" ' ' " , ' " " ') are possible and working:

import pygmt 

size = 1
title = "my title"

fig = pygmt.Figure()
fig.basemap(region=[-size, size] * 2, projection="X5c/1c", frame=[f'WSne+t"this is {title}"'])
fig.shift_origin(xshift="+w+1c")
fig.basemap(region=[-size, size] * 2, projection="X5c/1c", frame=[f"WSne+t'this is {title}'"])
fig.show()

[seisman]

As shown in #3457 (comment), single quotes are part of the text string since the first PyGMT version, so it's not considered to be a breaking change in v0.12.0.

[yvonnefroehlich]

Ah, OK. Then adjustment of the formulation is fair and makes sense.

[seisman]

I've removed the "skip-changelog" label from this PR. After this PR is merged, an entry will be added to the v0.14.0 draft changelog, which will remind us to mention this "breaking change in v0.12.0" when releasing v0.14.0.