Add a bit of documentation about the new multiple-USE_GITHUB.

[mat]

Create a sub-section inside USE_GITHUB to keep the multi-files thing to themselves.

[mat]

Shorten a title.

[mat]

• Extract USE_GITHUB from MASTER_SITES.

[wblock]

en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml

1927 ↗

(On Diff #6122)

s/The/the/

1928 ↗

(On Diff #6122)

s/would end/ends/

1975 ↗

(On Diff #6122)

"similar to" is the more common way to say that.

It works in a way very similar to <xref

1981 ↗

(On Diff #6122)

Split the sentence:
<varname>GH_TAGNAME</varname>. Each different value is

1990 ↗

(On Diff #6122)

s/it contains/containing/

2023 ↗

(On Diff #6122)

Split up the sentence:
github. The default file comes from

2025 ↗

(On Diff #6122)

<literal>1.0.2</literal>. The second file, tagged

2028 ↗

(On Diff #6122)

<literal>1.0</literal>. The third file comes from

2036 ↗

(On Diff #6122)

An "are" is missing in this sentence, either "are extracted" here, or "are in their respective" in the next line.

2038 ↗

(On Diff #6122)

s/sub-directories/subdirectories/
"default one" is kind of vague, usually better to be specific, the "default file" or whatever.

2041 ↗

(On Diff #6122)

additional distribution file is extracted in its

2042 ↗

(On Diff #6122)

End sentence at the end of the line:
<varname>${WRKSRC_<replaceable>tag</replaceable>}</varname>.

2043 ↗

(On Diff #6122)

Here, the <literal>icons</literal> tag is called

2045 ↗

(On Diff #6122)

Split sentence:
<filename>${WRKDIR}/foo-icons-1.0</filename>. The file

[mat]

With @wblock's comments.

[wblock]

Looks good to me. #include $igor-build-note. :)

[pgollucci]

this makes sense to me.