Fix some typos

Author: fisheryv

src/doc/en/constructions/algebraic_geometry.rst

@@ -38,7 +38,7 @@ algorithm. Here is an example of the syntax:
     sage: C.rational_points(algorithm="bn")
     [(0 : 0 : 1), (0 : 1 : 0), (2 : 2 : 1), (2 : 3 : 1), (3 : 1 : 1), (3 : 4 : 1)]
 
-The option ``algorithm="bn`` uses Sage's Singular interface and
+The option ``algorithm="bn"`` uses Sage's Singular interface and
 calls the ``brnoeth`` package.
 
 Here is another example using Sage's ``rational_points`` applied to

src/doc/en/constructions/interface_issues.rst

@@ -92,7 +92,7 @@ Sage and other computer algebra systems
 
 If ``foo`` is a Pari, GAP ( without ending semicolon), Singular,
 Maxima command, resp., enter ``gp("foo")`` for Pari,
-``libgap.eval("foo")}`` ``singular.eval("foo")``, ``maxima("foo")``, resp..
+``libgap.eval("foo")`` ``singular.eval("foo")``, ``maxima("foo")``, resp..
 These programs merely send the command string to the external
 program, execute it, and read the result back into Sage. Therefore,
 these will not work if the external program is not installed and in