diff --git a/prymer/api/coordmath.py b/prymer/api/coordmath.py
index 38e0150..1230a86 100644
--- a/prymer/api/coordmath.py
+++ b/prymer/api/coordmath.py
@@ -18,6 +18,7 @@ def get_closed_end(start: int, length: int) -> int:
         ```python
         >>> get_closed_end(start=10, length=5)
         14
+
         ```
     """
     return start + length - 1
diff --git a/prymer/model.py b/prymer/model.py
index 4f74869..471b1b0 100644
--- a/prymer/model.py
+++ b/prymer/model.py
@@ -119,6 +119,7 @@ class Span(Metric["Span"]):
     Span(refname='chr1', start=6, end=10, strand=<Strand.POSITIVE: '+'>)
     >>> print(span.length)
     10
+
     ```
 
     """
@@ -158,6 +159,7 @@ def from_string(cls, line: str) -> "Span":
         >>> span_string = "chr1:1-10:+"
         >>> Span.from_string(span_string)
         Span(refname='chr1', start=1, end=10, strand=<Strand.POSITIVE: '+'>)
+
         ```
 
         """
@@ -565,6 +567,7 @@ class PrimerPair:
         Span(refname='chr1', start=1, end=120, strand=<Strand.POSITIVE: '+'>)
         >>> list(primer_pair)
         [Oligo(bases='GGGGGGGGGGGGGGGGGGGG', tm=70.0, span=Span(refname='chr1', start=1, end=20, strand=<Strand.POSITIVE: '+'>), penalty=-123.0, name=None, tm_homodimer=None, tm_3p_anchored_homodimer=None, tm_secondary_structure=None, tail=None), Oligo(bases='TTTTTTTTTTTTTTTTTTTT', tm=70.0, span=Span(refname='chr1', start=101, end=120, strand=<Strand.NEGATIVE: '-'>), penalty=-123.0, name=None, tm_homodimer=None, tm_3p_anchored_homodimer=None, tm_secondary_structure=None, tail=None)]
+
         ```
 
     """  # noqa: E501
diff --git a/prymer/ntthal/__init__.py b/prymer/ntthal/__init__.py
index a69eaf3..6739cbc 100644
--- a/prymer/ntthal/__init__.py
+++ b/prymer/ntthal/__init__.py
@@ -101,6 +101,7 @@ def duplex_tm(self, s1: str, s2: str) -> float:
             >>> t = NtThermoAlign()
             >>> t.duplex_tm(s1 = "ACGT", s2 = "ACGT")
             -46.542706
+
             ```
 
         Returns:
diff --git a/prymer/primer3/primer3_input.py b/prymer/primer3/primer3_input.py
index a20b4ac..63ca943 100644
--- a/prymer/primer3/primer3_input.py
+++ b/prymer/primer3/primer3_input.py
@@ -91,6 +91,7 @@
 PRIMER_WT_SELF_ANY_TH -> 0.0
 PRIMER_WT_SELF_END_TH -> 0.0
 PRIMER_WT_HAIRPIN_TH -> 0.0
+
 ```
 
 """