Depgraph not build when ticket summary has double quotes in

[Alexey]

If you have a ticket that includes double quotes in the title then depgraph with summary=1 not build with warning in trac.log. For example if summary

 Some ticket about "a string to fix"

generate warning:

2020-07-23 15:25:14,091 Trac[graphviz] WARNING: dot command 'D:\sapr\webserver\Graphviz2.38\bin\dot.exe -Tcmapx' failed with code 1: Error: <stdin>: syntax error in line 6 near 'string'


2020-07-23 15:25:14,341 Trac[graphviz] WARNING: dot command 'D:\sapr\webserver\Graphviz2.38\bin\dot.exe -Tpng' failed with code 1: Error: <stdin>: syntax error in line 6 near 'string'

for summary

 Some ticket about "a_string_to_fix"

generate warning:

2020-07-23 15:27:07,934 Trac[graphviz] WARNING: dot command 'D:\sapr\webserver\Graphviz2.38\bin\dot.exe -Tcmapx' failed with code 1: Error: <stdin>: syntax error in line 5 near '"'


2020-07-23 15:27:08,200 Trac[graphviz] WARNING: dot command 'D:\sapr\webserver\Graphviz2.38\bin\dot.exe -Tpng' failed with code 1: Error: <stdin>: syntax error in line 5 near '"'

[Ryan J Ollos]

In 17852:

TracMasterTickets 4.0.5dev: Fix depgraph with summary containing quotes

Fixes #13854.