fix some minor issues

dirichlet/test/t-chars.c

@@ -10,6 +10,7 @@
 */
 
 #include "dirichlet.h"
+#include "arb.h" /* for test_multiplier */
 
 int main()
 {

doc/source/acb_dirichlet.rst

@@ -187,7 +187,7 @@ L-functions
 
    .. math::
 
-      \left(\frac{q}{π}\right)^{\frac{s+p}2}\Gamma\left(\frac{s+p}2\right) L(s, \chi) = \epsilon(\chi) \left(\frac{q}{π}\right)^{\frac{1-s+p}2}\Gamma\left(\frac{1-s+p}2\right) L(1 - s, \overline\chi)
+      \left(\frac{q}{\pi}\right)^{\frac{s+p}2}\Gamma\left(\frac{s+p}2\right) L(s, \chi) = \epsilon(\chi) \left(\frac{q}{\pi}\right)^{\frac{1-s+p}2}\Gamma\left(\frac{1-s+p}2\right) L(1 - s, \overline\chi)
 
    - The *theta* variant uses the evaluation at `t=1` of the Theta series.
 

doc/source/dirichlet.rst

@@ -166,7 +166,7 @@ Character type
 
     Same as :func:`dirichlet_char_next`, but jumps to the next primitive character of *G*.
 
-.. function:: ulong dirichlet_index_char(const dirichlet_group_t G, const dirichlet_char_t x);
+.. function:: ulong dirichlet_index_char(const dirichlet_group_t G, const dirichlet_char_t x)
 
     Returns the lexicographic index of the *log* of *x* as an integer in `0\dots \varphi(q)`.