[texinfo.tex 2026-06-14.21]
Consider input file `foo.texi`
```
\input texinfo
aaa
@include test file.texi
ccc
@bye
```
and input file `test file.texi`:
```
bbb
```
Processing `foo.texi` with `makeinfo` works just fine. However,
running `texi2pdf` fails with
```
./foo.texi:5: I can't find file `test'.
@temp ->@input test
file.texi
@includezzz ...and @input #1 }@expandafter }@temp
@popthisfilestack
l.5 @include test file.texi
```
I couldn't find anywhere in the documentation that `@include` does not
accept file names containing spaces. AFAICS, since `@include` needs a
line of its own, such a limitation is not necessary. Compare this to
LaTeX's `\input{...}` command, which also accepts file names with
spaces.
Werner
