An extra newline was being added by the editor

.editorconfig

@@ -8,3 +8,6 @@ insert_final_newline = true
 indent_style = space
 indent_size = 4
 charset = utf-8
+
+[*.jinja2]
+insert_final_newline = false

mythril/analysis/report.py

@@ -38,7 +38,7 @@ class Issue:
             self.lineno = codeinfo.lineno
 
 class Report:
-    environment = Environment(loader=PackageLoader('mythril.analysis'))
+    environment = Environment(loader=PackageLoader('mythril.analysis'), trim_blocks=True)
 
     def __init__(self, verbose=False):
         self.issues = {}

mythril/analysis/templates/report_as_markdown.jinja2

@@ -1,7 +1,7 @@
 # Analysis results for {{ filename }}
-
-{%- if issues %}
+{% if issues %}
 {% for key, issue in issues.items() %}
+
 ## {{ issue.title }}
 
 - Type: {{ issue.type }}
@@ -11,25 +11,27 @@
 
 ### Description
 
-{{ issue.description }}
-{% if issue.filename and issue.lineno -%}
+{{ issue.description.rstrip() }}
+{% if issue.filename and issue.lineno %}
 In file: {{ issue.filename }}:{{ issue.lineno }}
-{%- endif -%}
-{%- if issue.code %}
+{% endif %}
+{% if issue.code %}
 
 ### Code
 
 ```
 {{ issue.code }}
 ```
-{%- endif %}
-{%- if verbose and issue.debug -%}
+{% endif %}
+{% if verbose and issue.debug %}
 --------------------
 ### Debugging Information:
 
 {{ issue.debug }}
-{%- endif %}
-{% endfor -%}
-{%- else -%}
+
+{% endif %}
+{% endfor %}
+{% else %}
+
 The analysis was completed successfully. No issues were detected.
-{%- endif -%}
+{% endif %}

mythril/analysis/templates/report_as_text.jinja2

@@ -1,5 +1,5 @@
-{%- if issues -%}
-{% for key, issue in issues.items() -%}
+{% if issues %}
+{% for key, issue in issues.items() %}
 ==== {{ issue.title }} ====
 Type: {{ issue.type }}
 Contract: {{ issue.contract | default("Unknown") }}
@@ -7,22 +7,23 @@ Function name: {{ issue.function }}
 PC address: {{ issue.address }}
 {{ issue.description }}
 --------------------
-{% if issue.filename and issue.lineno -%}
+{% if issue.filename and issue.lineno %}
 In file: {{ issue.filename }}:{{ issue.lineno }}
-{%- endif %}
-{%- if issue.code %}
+{% endif %}
+{% if issue.code %}
 
 {{ issue.code }}
 
 --------------------
-{% endif -%}
-{% if verbose and issue.debug -%}
+{% endif %}
+{% if verbose and issue.debug %}
 --------------------
 DEBUGGING INFORMATION:
 
 {{ issue.debug }}
-{%- endif %}
-{% endfor -%}
-{%- else -%}
+{% endif %}
+
+{% endfor %}
+{% else %}
 The analysis was completed successfully. No issues were detected.
-{%- endif -%}
+{% endif %}