[alg.partitions] Fixed some transcription errors

Author: tkoeppe

source/algorithms.tex

@@ -9894,9 +9894,9 @@
 let
 \begin{itemize}
 \item
-  $M$ be the number of iterators in \range{first}{last}
-  for which $E(\tcode{i})$ is \tcode{true},
-  and $K$ be \tcode{last - first};
+  $M$ be the number of iterators \tcode{i} in \range{first}{last}
+  for which $E(\tcode{*i})$ is \tcode{true},
+  and $K$ be \tcode{last - first - $M$};
 \item
   \tcode{last_true} be \tcode{out_true + $M$}, and
   \tcode{last_false} be \tcode{out_false + $K$}.
@@ -9905,7 +9905,7 @@
 \pnum
 For the overloads with parameters
 \tcode{last_true}, \tcode{last_false}, \tcode{out_true_r}, or \tcode{out_false_r},
-let $M$ be \tcode{last_true} \tcode{last_true - out_true}
+let $M$ be \tcode{last_true - out_true}
 and $K$ be \tcode{last_false - out_false}.
 
 \pnum