[simd.mask.ctor] Remove space before \iref

Author: mattkretz

source/numerics.tex

@@ -19267,7 +19267,7 @@
 \effects
 Initializes the first $M$ elements to the corresponding bit values in
 \tcode{val}, where $M$ is the smaller of \tcode{size()} and the number of bits in
-the value representation \iref{basic.types.general} of the type of \tcode{val}. If
+the value representation\iref{basic.types.general} of the type of \tcode{val}. If
 $M$ is less than \tcode{size()}, the remaining elements are initialized to
 zero.
 \end{itemdescr}