[linalg.general] Remove extraneous dot (cplusplus#7637)

Author: lprv

source/numerics.tex

@@ -11678,7 +11678,7 @@
 that is a multidimensional index in \tcode{x.extents()},
 there exists a pack of integers \tcode{j}
 that is a multidimensional index in \tcode{y.extents()},
-such that \tcode{x[i....]} and \tcode{y[j...]} refer to the same element.
+such that \tcode{x[i...]} and \tcode{y[j...]} refer to the same element.
 \begin{note}
 Aliasing is a special case of overlapping.
 If \tcode{x} and \tcode{y} do not overlap,