[linalg.algs.reqs] Remove whitespace before \iref (#7717)

Author: mattkretz

source/numerics.tex

@@ -13319,8 +13319,8 @@
 \tcode{is_execution_policy<ExecutionPolicy>::value}
 is \tcode{true}\iref{execpol.type}.
 \item
-\tcode{Real} is any type such that \tcode{complex<Real>} is specified
-\iref{complex.numbers.general}.
+\tcode{Real} is any type such that \tcode{complex<Real>} is
+specified\iref{complex.numbers.general}.
 \item
 \tcode{Triangle} is either \tcode{upper_triangle_t} or \tcode{lower_triangle_t}.
 \item