Update doc/specs/stdlib_linalg.md

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

Author: perazz

doc/specs/stdlib_linalg.md

@@ -922,7 +922,7 @@ The solver is based on LAPACK's `*GEEV` backends.
 
 ### Arguments
 
-`a` : `real` or `complex` square array containing the coefficient matrix. It is normally an `intent(in)` argument. If `overwrite_a=.true.`, it is an `intent(inout)` argument and is destroyed by the call. 
+`a` : `real` or `complex` square array containing the coefficient matrix. If `overwrite_a=.false.`, it is an `intent(in)` argument. Otherwise, it is an `intent(inout)` argument and is destroyed by the call. 
 
 `lambda`: Shall be a `complex` rank-1 array of the same kind as `a`, containing the eigenvalues. It is an `intent(out)` argument.