Update doc/specs/stdlib_linalg.md

Co-authored-by: Jeremie Vandenplas <jeremie.vandenplas@gmail.com>

Author: perazz

doc/specs/stdlib_linalg.md

@@ -39,7 +39,6 @@ These can be enabled during the build process. For example, with CMake, one can
 The same is possible from the `fpm` branch, where the `cpp` preprocessor is enabled by default. For example, the macros can be added to the project's manifest:
 
 ```toml
-
 [dependencies]
 stdlib="*"