The following fixes a reported typo.
* doc/invoke.texi (C++ Modules): Fix typo.
@cindex speed of compilation
Modules are a C++20 language feature. As the name suggests, they
-provides a modular compilation system, intending to provide both
+provide a modular compilation system, intending to provide both
faster builds and better library isolation. The ``Merging Modules''
paper @uref{https://wg21.link/p1103}, provides the easiest to read set
of changes to the standard, although it does not capture later