Created attachment 9728 [details]
/tmp/hello.ps

I made a SVG file using

# echo "Hello" | a2ps -1 -o /tmp/hello.ps
# gs -sDEVICE=svg -sOutputFile=/tmp/hello.svg -dNOPAUSE -dBATCH /tmp/hello.ps

When I try to display /tmp/hello.svg in my Firefox browser,
Firefox cannot display it and shows those syntax errors:

XML Parsing Error: not well-formed
Location: file:///tmp/hello.svg
Line Number 7, Column 18:
<g  stroke='none'#000000>
-----------------^

XML Parsing Error: not well-formed
Location: file:///tmp/hello.svg
Line Number 184, Column 21:
<g  stroke='#f5f5f5'#000000 stroke-width='83.333328'>
--------------------^

XML Parsing Error: not well-formed
Location: file:///tmp/hello.svg
Line Number 187, Column 21:
<g  stroke='#000000'#000000 stroke-width='2.916667'>
--------------------^

I fixed those syntax errors manually one by one and this is the diff:
---------------------------------------------------------------------------
7c7
< <g  stroke='none'#000000>
---
> <g  stroke='none'>
184c184
< <g  stroke='#f5f5f5'#000000 stroke-width='83.333328'>
---
> <g  stroke='#f5f5f5' stroke-width='83.333328'>
187c187
< <g  stroke='#000000'#000000 stroke-width='2.916667'>
---
> <g  stroke='#000000' stroke-width='2.916667'>
---------------------------------------------------------------------------
I.e. I removed the #000000 addendums after the '...'
and now Firefox can display the SVG file.