DOC: Fix a couple of reference to verbatim and vice versa

This update a coupe of references (single backticks) that actually are not to
verbatim/code (double backticks); and a couple of verbatim to reference
when they do actually exists and can be resolved in context.

I probably missed other; and stayed simple but spoted a few other
inconsistencies that I did not fix:

  - some ``...`` could actually be :math:`...` but not always clear if
  it would be better.
  - some intervals are [``...``], other are ``[...]``

I guess they could be discussed individually; it was mostly the failing
references that bothered me.

1 files changed, 4 insertions, 4 deletions

diff --git a/numpy/lib/scimath.py b/numpy/lib/scimath.py
index 2b0d38c37..ed9ffd295 100644
--- a/numpy/lib/scimath.py
+++ b/numpy/lib/scimath.py
@@ -572,10 +572,10 @@ def arctanh(x):
     Compute the inverse hyperbolic tangent of `x`.
 
     Return the "principal value" (for a description of this, see
-    `numpy.arctanh`) of `arctanh(x)`. For real `x` such that
-    `abs(x) < 1`, this is a real number.  If `abs(x) > 1`, or if `x` is
+    `numpy.arctanh`) of ``arctanh(x)``. For real `x` such that
+    ``abs(x) < 1``, this is a real number.  If `abs(x) > 1`, or if `x` is
     complex, the result is complex. Finally, `x = 1` returns``inf`` and
-    `x=-1` returns ``-inf``.
+    ``x=-1`` returns ``-inf``.
 
     Parameters
     ----------
@@ -597,7 +597,7 @@ def arctanh(x):
     -----
     For an arctanh() that returns ``NAN`` when real `x` is not in the
     interval ``(-1,1)``, use `numpy.arctanh` (this latter, however, does
-    return +/-inf for `x = +/-1`).
+    return +/-inf for ``x = +/-1``).
 
     Examples
     --------